二次指数平滑预测法(已编辑好公式)

项目年度GDP客运量客运周转量货运量货物周转量参数a：0.8atbt二次平滑法预测值nullnull（亿元）（万人）nullnullnullst1st2st1-st22st1-st2a/（1-a）(st1-st2)null200189.94630.79nullnullnull630.79630.790630.790null200296.66702.01nullnullnull687.766676.370811.3952699.161245.5808630.79null2003103.05845.05nullnullnull813.5932786.1487227.44448841.03768109.77792744.742null2004111.62778nullnullnull785.11864785.324656-0.206016784.912624-0.824064950.8156null2005115.79746nullnullnull753.823728760.1239136-6.3001856747.5235424-25.2007424784.08856null2006128.062441.4nullnullnull2103.88474561835.1325792268.75216642372.6369121075.0086656722.3228null2007145.882531nullnullnull2445.576949122323.488075136122.0888739842567.665823104488.3554959363447.6455776null2008164.372578nullnullnull2551.5153898242505.909926886445.60546293762597.1208527616182.42185175043056.02131904null2009167.732657nullnullnull2635.90307796482609.904447749125.99863021572661.9017081805103.99452086272779.542704512null2010200.222765nullnullnull2739.1806155932713.325382024225.85523356882765.0358491617103.42093427512765.8962290432null2011223.232570nullnullnull2603.83612311862625.7339748997-21.89785178112581.9382713375-87.59140712452868.4567834368null2012238.262525nullnull2540.76722462372557.7605746789-16.99335005522523.7738745685-67.97340022082494.346864213null2013257.782692nullnullnull2661.75344492472640.954870875620.79857404922682.552018973983.19429619672455.8004743477null2014267.182778nullnullnull2754.7506889852731.991525363122.75916362192777.509852606891.03665448752765.7463151706null2015287.922761nullnullnull2759.7501377972754.19841531025.55172248682765.301860283822.20688994712868.54650709432016nullnullnullnullnullnullnullnullnullnullnull2787.5087502309